Gas fireplace combustion device structure

Abstract

A gas fireplace combustion device structure includes a simulated solid fuel and a combustor under the simulated solid fuel. The combustor has a fire exit hole facing the simulated solid fuel, a combustion air inlet passage under the combustor, and a specific slot at the combustor to define a third combustion air inlet. A partition is installed under the combustor; a second combustion air inlet leading to fire exit hole is formed between the partition and the combustor; the combustion air inlet passage is provided for supplying air to the second and third combustion air inlets; a combustion air slot is formed at the middle of the simulated solid fuel to resupply combustion air to the flame above the simulated solid fuel in order to achieve a two-time sectional combustion. This invention can control and resupply combustion air to the flames in different areas to improve the combustion effect.

Claims

1. A gas fireplace combustion device structure, comprising; a combustor; and a simulated solid fuel, wherein the combustor is installed under the simulated solid fuel, and a fire exit hole is formed on the combustor and configured to face at least one side of the periphery of the simulated solid fuel, and a combustion air inlet passage is disposed under the combustor, and wherein the combustor has a slot formed at the middle thereof to form a combustion air inlet, and the combustion air inlet passage communicates to the combustion air inlet, and the simulated solid fuel has a combustion air slot formed thereon, and the combustion air slot and the combustion air inlet communicate with each other directly.

2. The gas fireplace combustion device structure of claim 1, wherein the combustor has a partition disposed thereunder, and a further combustion air inlet leading to the fire exit hole is formed between the partition and a lower surface of the combustor lower surface, and the further combustion air inlet and the combustion air inlet passage communicate with each other.

3. The gas fireplace combustion device structure of claim 1, wherein the combustion air slot is an irregular shaped strip slot, or one or more small holes, or a combination of the irregular shaped strip slot and the small holes.

4. The gas fireplace combustion device structure of claim 3, wherein the quantity of the combustion air slot is one, two, or more.

5. The gas fireplace combustion device structure of claim 1, wherein the simulated solid fuel is formed by combining two or more pieces.

6. The gas fireplace combustion device structure of claim 5, wherein the combustion air slot is a slit or a gap between two or more simulated solid fuels.

7. The gas fireplace combustion device structure according to claim 1, wherein the combustion air slot has an average width of 1 mm˜25 mm.

8. The gas fireplace combustion device structure claim 1, wherein the combustion air inlet is a grooved opening having an average width of 2 mm˜30 mm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view of a first embodiment of the present invention;

(2) FIG. 2 is a partial cross-sectional view of the first embodiment of the present invention;

(3) FIG. 3 is another perspective view of the first embodiment of the present invention;

(4) FIG. 4 is an exploded view of the first embodiment of the present invention;

(5) FIG. 5 is a perspective view of a second embodiment of the present invention;

(6) FIG. 6 is a partial cross-sectional view of the second embodiment of the present invention;

(7) FIG. 7 is another perspective view of the second embodiment of the present invention;

(8) FIG. 8 is an exploded view of the second embodiment of the present invention;

(9) FIG. 9 is a half section view of the second embodiment of the present invention;

(10) FIG. 10 is a schematic view showing the fuel combustion and the flow of combustion air in accordance with the second embodiment of the present invention;

(11) FIG. 11 is a schematic view of a gas fireplace having a plurality of combustion device structures installed in a furnace chamber in accordance with the second embodiment of the present invention;

(12) FIG. 12 is a schematic view of a simulated solid fuel in a gas fireplace in accordance with a third embodiment of the present invention;

(13) FIG. 13 is a perspective view of a single simulated solid fuel in a fourth embodiment of the present invention; and

(14) FIG. 14 is an exploded view of a single simulated solid fuel in the fourth embodiment of the present invention.

(15) Brief Description of Numerals in the Drawings: 1—combustor; 2—simulated solid fuel; 3—partition; 4—combustion air inlet passage; 5—nozzle; 6—auxiliary combustion inlet; 11—fire exit hole; 12—third combustion air inlet; 13—second combustion air inlet; 14—fuel gas inlet; 15—first combustion air inlet; 21—combustion air slot; and 51—fuel ejection outlet.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(16) To make it easier for our examiner to understand the objective of the invention, its structure, innovative features, and performance, we use a preferred embodiment together with the attached drawings for the detailed description of the invention.

Embodiment 1

(17) With reference to FIGS. 1 to 4 for a gas fireplace combustion device structure in accordance with the first embodiment of the present invention, the gas fireplace combustion device structure comprises a combustor 1 and a simulated solid fuel 2, and this embodiment has pairs of combustors 1 disposed under the simulated solid fuel 2, and the simulated solid fuel 2 is disposed on an upper surface of the combustor 1. A combustion air inlet passage 4 is disposed under the combustor 1 and configured combustion air inlet passage 4 to be parallel to a fuel gas inlet 14 of the combustor 1, and the combustion air inlet passage 4 has an entrance outside a furnace chamber, and each of the paired combustors 1 has a fire exit hole 11 formed thereon. In this embodiment, the fire exit holes 11 are configured to be facing both sides of the simulated solid fuel 2 respectively, and a third combustion air inlet 12 is formed in an interval between the paired combustors 1, and the third combustion air inlet 12 has an average width of 2 mm˜30 mm (which is approximately equal to 9 mm in this embodiment) and a partition 3 is installed under the combustor 1, and a second combustion air inlet 13 leading to the fire exit hole 11 is formed between the partition 3 and a lower surface of the combustor 1, and the combustion air inlet passage 4 communicates to the third combustion air inlet 12 and the second combustion air inlet 13. The simulated solid fuel 2 has a combustion air slot 21 formed thereon, and the combustion air slot 21 communicates to the third combustion air inlet 12 directly, and the combustion air slot 21 is an irregular stripe shaped slot with an average width of 1 mm˜25 mm (which is approximately equal to 4 mm in this embodiment). The fuel gas inlet 14 has nozzle 5 coupled thereto, and the nozzle 5 has a fuel ejection outlet 51 formed thereon and the fuel gas inlet 14 has a first combustion air inlet 15 formed thereon.

(18) During combustion, the combustible gas is ejected from the fuel ejection outlet 51 of the nozzle 5 and entered into the fuel gas inlet 14. According to the Venturi effect, the ejected combustible gas attracts air to enter into the fuel gas inlet 14 from the first combustion air inlet 15 quickly, so that the combustible gas and air are pre-mixed in the fuel gas inlet 14 and then entered from the fuel gas inlet 14 into the cavity of the combustor 1, and sprayed out from fire exit hole 11 and finally ignited. Now, the flame burns on both sides of the simulated solid fuel 2. In the meantime, the combustion air enters to the bottom of the combustor 1 from the combustion air inlet passage 4, and then passes through the second combustion air inlet 13 to reach the fire exit hole 11 to help burning the flame. Now, a primary combustion of the combustible gas is carried out at the fire exit hole 13. The flame of the primary combustion of the combustible gas moves upward along the simulated solid fuel 2 and passes through the third combustion air inlet 12 and the combustion air slot 21 to reach the third combustion air above the simulated solid fuel 2, so as to resupply combustible air to the bottom of the flame and carry out a secondary combustion of the flame. With the two-time sectional combustion of the flame, the amount of resupplied combustion air and the temperature of the flame at different areas during fuel combustion can be controlled reasonably to reduce the content of nitrogen oxides produced by the fuel combustion while making the color of the flame brighter and cleaner.

Embodiment 2

(19) With reference to FIGS. 5 to 11 for a gas fireplace combustion device structure in accordance with the second embodiment of the present invention, the difference between this embodiment and the first embodiment resides on that the combustion air inlet passage 4 is installed around the fuel gas inlet 14 of the combustor 1, and such arrangement not only saves space, but also allows the combustion air to enter from the combustion air inlet passage 4 into the third combustion air inlet 12 and the second combustion air inlet 13 more uniformly.

(20) With reference to FIG. 11 for a schematic view of a gas fireplace having a plurality of combustion device structures installed in a furnace chamber in accordance with the second embodiment of the present invention, the combustion air inlet passage 4 has an entrance communicating to the outer bottom of the furnace chamber, and an auxiliary combustion inlet 6 formed on a bottom plate of the combustion device installed to the gas fireplace of the second embodiment is provided for supplying combustion air for the whole operation of the gas fireplace.

Embodiment 3

(21) In FIG. 12 the combustion air slot 21 is comprised of a plurality of irregular small holes.

Embodiment 4

(22) In FIGS. 13 and 14, the simulated solid fuel 2 is formed by combining three pieces, and the combustion air slot 21 is a gap formed between the three combined simulated solid fuels 2, and the combustor 1 is one-piece installed under the simulated solid fuel 2, and the third combustion air inlet 12 is formed at the middle of the combustor 1, and there are two combustion air inlet passages 4 configured to be parallel to the fuel gas inlet 14.

(23) While the invention has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims.